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4 2006

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Mixing time of the shear-thinning fluids in the agitated vessel

100%

Broniarz-Press L. , Woziwodzki S.

2006

tom Vol. 8, nr 4

50-52

The paper deals with the results of experiments on the mixing phenomena in a vessel with different impellers. The flat-bottomed vessel was equipped with Rushton turbines, six flat blade turbines and six pitched down blade turbines. The mixing time related to both, the vessel construction and the rheological properties of the liquid stirred, has been analyzed. The best impeller-tank system, taking into account the process efficiency, has been proposed.

The effect of the rheological properties of the liquid on pressure drop in a spray column

84%

Broniarz-Press L. , Ochowiak M. , Szaferski W.

2006

tom Vol. 8, nr 4

20-22

In the paper the results of experimental studies on the effect of the reological properties of the liquid on pressure drop for the air-water and air-polymer solutions flow in the spray column equipped with conical and profiled confusors, have been presented. It has been shown that in polymer solutions the drag coefficient is greater than that in water. The reduction of pressure drop in a column with a confusor of profiled internal surfaces has been observed.

Analiza powierzchni swobodnej filmu cieczy o złożonych właściwościach reologicznych

84%

Broniarz-Press L. , Dulska D.

2006

tom Nr 6s

22-24

The studies presented were focused on the effect of polymers and surfactants additives on changes in the free surface of liquid falling film. The suppression of surface waves and the decrease of the mean film thickness have been observed. Total decay of waves on the free surface in surfactant solutions can be explained by flow laminarization and by the formation of internal shear-induced structures.

Mixing in two-phase systems in the presence of non-Newtonian media

67%

Broniarz-Press L. , Borowski J. , Szaferski W.

2006

tom Vol. 8, nr 1

54-60

The paper presents some chosen questions of the non-Newtonian properties of a liquid effect on suspending and aeration in agitated systems. Special attention throughout the study was paid to the critical agitator speed and gas hold-up in viscous power-law liquids (aqueous solutions of high-molecular carboxymethylcellulose sodium salt and polyacrylamide). The tested agitator was the standard Rushton turbine. The gas distributor had a truncated cone form.